hunter icv sprinkler valve leaking from flow control

can someone have experience in fixing this kind of leaking from flow control? Thank you.

买个新的。
一般情况上，只需要换那个四个螺丝卸下来的部分, valve body部分还是用旧的，还有接线之前拍好照，用不同的标签做好标记方便接线。